BAT54WS Equivalent & Substitute Parts

Part Overview

The BAT54WS is a Schottky diode manufactured by SMC Diode Solutions, rated for 30 V DC reverse voltage and 100 mA average rectified current in a surface mount SOD-323 package. This component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the allowed parameter ranges for this diode category. Substitutes may offer enhanced current ratings or alternative packaging configurations while preserving core functional characteristics.

Substiute Parts

BAT54WS

SMC Diode SolutionsIn Stock: 305308BAT54WS Datasheet

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BAT5403WE6327HTSA1

Infineon TechnologiesIn Stock: 19048BAT5403WE6327HTSA1 Datasheet

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CUS520,H3F

Toshiba Semiconductor and StorageIn Stock: 30251CUS520,H3F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BAT54WS are qualified based on the following criteria:

Electrical Compatibility Parameters:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 30 V
• Technology: Must be Schottky diode type
• Speed Classification: Must be Small Signal ≤ 200mA (Io), Any Speed
• Reverse Recovery Time (trr): Must equal or be faster than 5 ns
• Operating Temperature Range: Must support junction temperatures up to 150°C or higher

Mechanical Compatibility Parameters:

• Package / Case: Must be SC-76 or SOD-323
• Mounting Type: Must be Surface Mount

Compliance Parameters:

• RoHS Status: Must be ROHS3 Compliant
• Moisture Sensitivity Level (MSL): Must be 1 (Unlimited)

Substitute parts may have higher current ratings (Io) than the main part, as this represents an enhancement that does not restrict application in circuits designed for the BAT54WS. Forward voltage (Vf) and reverse leakage current (Ir) variations are acceptable within the Schottky diode classification, provided they do not exceed the specified maximums at their respective test conditions.

Parameter Comparison

Engineering Selection Recommendations

BAT5403WE6327HTSA1 (Infineon Technologies)

This substitute part meets all electrical and mechanical compatibility requirements. The BAT5403WE6327HTSA1 maintains the 30 V reverse voltage rating and 5 ns reverse recovery time. The doubled current rating (200 mA vs. 100 mA) provides design margin without compromising performance in BAT54WS applications. Forward voltage is reduced to 800 mV at 100 mA, improving efficiency. The part is ROHS3 compliant with MSL 1 rating. Packaging is provided in Tape & Reel (TR) format with PG-SOD323-3D supplier device package designation. Maximum junction temperature is 150°C, matching the BAT54WS upper operating limit.

CUS520,H3F (Toshiba Semiconductor and Storage)

This substitute part satisfies core electrical and mechanical requirements with 30 V reverse voltage and SOD-323 package compatibility. The CUS520,H3F offers 200 mA current rating and demonstrates superior forward voltage characteristics (280 mV at 10 mA). Reverse leakage current is specified at 5 µA at 30 V, which is within acceptable Schottky diode parameters. The part is ROHS3 compliant with MSL 1 rating. Packaging is available in Cut Tape (CT) and Digi-Reel® formats. Maximum junction temperature is 125°C, which is lower than the BAT54WS but remains suitable for most applications within the specified operating range. Capacitance is 17 pF at 0 V, 1 MHz.

Both substitute parts are Active product status and maintain full regulatory compliance. Selection between substitutes depends on specific application requirements regarding packaging format, temperature headroom, and forward voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the BAT5403WE6327HTSA1 be used as a direct replacement for the BAT54WS?

A: Yes. Both parts share identical 30 V reverse voltage rating, 5 ns reverse recovery time, and SOD-323 package configuration. The BAT5403WE6327HTSA1 has a higher current rating (200 mA vs. 100 mA), which is compatible with BAT54WS applications. Forward voltage is lower (800 mV at 100 mA), improving circuit efficiency.

Q: Can the CUS520,H3F be used as a direct replacement for the BAT54WS?

A: Yes. Both parts share identical 30 V reverse voltage rating and SOD-323 package configuration. The CUS520,H3F has a higher current rating (200 mA vs. 100 mA) and lower forward voltage (280 mV at 10 mA). Maximum junction temperature is 125°C, which is lower than the BAT54WS (150°C), but remains within acceptable operating parameters for most applications.

Q: What are the key differences between the two substitute parts?

A: The BAT5403WE6327HTSA1 (Infineon) and CUS520,H3F (Toshiba) both offer 200 mA current ratings and 30 V reverse voltage. The Infineon part maintains 5 ns reverse recovery time and supports 150°C maximum junction temperature. The Toshiba part features lower forward voltage (280 mV at 10 mA) but has a 125°C maximum junction temperature limit. Packaging formats differ: Infineon uses Tape & Reel (TR), while Toshiba offers Cut Tape (CT) and Digi-Reel® options.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The BAT54WS, BAT5403WE6327HTSA1, and CUS520,H3F are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: Does the higher current rating of substitute parts affect compatibility?

A: No. A higher current rating (Io) represents an enhancement and does not restrict use in circuits designed for the BAT54WS. The substitute parts can safely operate at or below the BAT54WS current specification of 100 mA.

Q: What packaging options are available for each part?

A: The BAT54WS packaging type is not specified in the data. The BAT5403WE6327HTSA1 is supplied in Tape & Reel (TR) format. The CUS520,H3F is available in Cut Tape (CT) and Digi-Reel® formats. All three parts use the SOD-323 package case.

Q: Are there temperature range considerations when selecting a substitute?

A: The BAT54WS operates from -55°C to 150°C junction temperature. The BAT5403WE6327HTSA1 supports up to 150°C maximum. The CUS520,H3F supports up to 125°C maximum. For applications requiring the full -55°C to 150°C range, the BAT5403WE6327HTSA1 is the preferred substitute.